184 



CRUCIFER^:. XXXIII. DRABA. 



of 2140 feet. Very like D. Jorullensis. Flowers unknown. 

 Pods elliptical, pointed by the short style. Trunk of root 

 woody. 



Tolucco Whitlow-Grass. 



PI. i foot. 



SECT. III. LEUCODRA'BA (from \CVKOG, leucos, white, and 

 Draba, that is to say, Draba with white flowers.) D. C. syst. 2. 

 p. 342. prod. 1. p. 168. Small perennial tufted plants, with white 

 flowers, and blunt or emarginate petals ; leaves flaccid, not stiff. 



24 D. BOREA'LIS (D. C. syst. 2. p. 342.) scape hairy, bearing 

 1 ovate leaf, the rest of the leaves are oblong and narrowed at 

 the base, entire, velvety with branched hairs ; pods ovate. If. . 

 H. Native of the island of St. Paul. Petals white, oblong- 

 cuneated, twice the length of the calyx. 



Northern Whitlow Grass. PI. A foot. 



25 D. OBLONGA*TA(R.Br. in Ross's voy. append.) scapes naked, 

 somewhat hairy with floccose down ; leaves rosulate, oblong- 

 linear, entire, ciliated and velvety ; pods oblong-elliptical, vel- 

 vety. If. H. Native of North America in the polar regions, 

 particularly at Baffin's Bay. Style very short. 



Oblong-podded Whitlow-Grass. Fl. May, June. Clt. 1820. 



26 D. CORYMBOSA (R. Br. in Ross's voy. append.) scapes 

 naked, rather hispid ; leaves densely rosulate, oblong, narrowed 

 at the base, ciliated, and somewhat hispid ; pods elliptical, corym- 

 bose, rather hispid. If. . H. Native of the polar regions of 

 North America, particularly at Baffin's Bay. Pods elliptical ; 

 Style very short, and terminated by the somewhat capitate stigma. 



Corymbose Whitlow- Grass. Fl. May, June. Clt. 1820. Pl.ift. 



27 D. WORMSKIO'LDH (Fisch. ex Spreng. syst. 2. p. 874.) 

 leaves oblong, with one tooth on each side ; scape 1 -leaved, and 

 is, as well as the leaves, beset with branched pili ; flowers in 

 corymbs ; silicles oblong, smooth. I/ . H. Native in the ex- 

 treme eastern parts of Siberia. Flowers white. 



Wormskiold's Whitlow-Grass. PI. A foot. 



28 D. MURICE'LLA (Wahl. fl. lapp. 178. no. 318. t. 11. f. 2.) 

 scape naked, velvety ; leaves oblong, entire, greyish-velvety 

 with stellate hairs ; pods oblong-lanceolate, smooth. I/ . H. 

 Native of Norway, Lapland, on dry hills, and perhaps on the 

 western coast of North America and Labrador. D. hirta, Oeder. 

 fl. dan. t. 214. D. Liljebladii of Wallm. D. nivalis, Liljebl. nov. 

 act. ups. 6. p. 47. t. 2. f. 2. Flowers small, whitish. Pods ob- 

 long-lanceolate, acute at both ends, and very smooth. 



Var. j3, ccesia (Adams, in mem. soc. nat. mosc. 5. p. 268.) 

 differing from the species in the flowers being sulphur-coloured, 

 not whitish, and with the leaves rarely toothed. "If. . H. Native 

 of the north of Siberia at the mouth of the river Lena, at the 

 promontory called Bykofskoy-mys. 



Little-hispid Whitlow-Grass. Fl. May,Ju. Clt. 1825. PI. Aft. 



29 D. HI RTA (Lin. spec. 897.) scapes puberulous, bearing 

 2 dentate leaves ; radical leaves oblong, nearly entire, puberu- 

 lous ; pods oblong, and are, as well as the pedicels, smooth. If. . 

 H. Native of Lapland, Norway, and Greenland, on dry shaded 

 rock in the lower mountains. Wahl. fl. lapp. p. 175. no. 319. 

 t. 1 1 . f. 3. A very polymorphous plant, which is often con- 

 fused with D. rupestris. 



Var. ft, apicola (Wahl. 1. c. t. 11. f. 1.) more stiff and dwarfer 

 habit, and the hairs are more stellate than in the other varieties. 

 I/ . H. Native on the higher mountains of the above men- 

 tioned countries. 



Var. y, Norvegica (Gunn. fl. norv. 2. p. 106. no. 846.) radi- 

 cal leaves larger, somewhat cuneated, acute, toothed, crowded. 

 I/. H. Draba Pyrenaica, Oed. fl. dan. t. 143. but not of Lin. 

 Native of the Alps of Norway, especially near Port Olaus. 



Var. S, siliquosa (Cham, et Schlecht. Linnaea. 1. p. 23.) plant 

 with a more lose habit ; siliques longer. $ . H. Native of 



Unalaschka. Leaves broader and more toothed. Sepals beset with 

 simple and forked hairs towards the apex. Siliques 9-lines long. 

 Hairy Whitlow-Grass. Fl. May, July. Clt. 1817. PI. i 

 to -j and even ^ foot. 



30 D. RUPE'STRIS (R. Br. in hort. kew. ed. 2. vol. 4. p. 91.) 

 scapes puberulous, naked or bearing one leaf; leaves lanceolate, 

 pilose, almost entire ; pods lanceolate, and are, as well as the 

 pedicels, pubescent. I/ . H. Native on rocks near the summit 

 of Ben Lawers in Scotland, also on rocks in the mountains of 

 Norway ; North America, in the Bay of St. Lawrence, also in 

 the islands of Unalaschka and St. Lawrence. Draba hirta, Smith, 

 fl. brit. 2. p. 677. engl. bot. t. 1338. but not of Lin. Draba stel- 

 lata, With. fl. brit. 565. Pods lanceolate, hairy-pubescent with 

 very short simple or forked hairs, sometimes but very, rarely 

 smooth. 



- Rock Whitlow-Grass. Fl. May, June. Scotland. PI. 2 or 3 in. 



31 D. NIVA'LIS (Willd. spec. 3. p. 427.) scapes naked or one 

 leaved, smooth ; leaves oblong-linear, ciliated, and somewhat 

 pilose ; pods elliptic-oblong, and are, as well as pedicels, 

 smooth. If.. H. Native of Lapland, Norway, Switzerland, 

 Savoy, and Dauphiny, in rocky places on the higher alps. D. 

 stellata, Oed. fl. dan. t. 142. Pods elliptical-oblong, quite 

 smooth. 



Snow Whitlow-Grass. Fl. April, Ju. Clt. 1820. PI. 1 or 2 in. 



32 D. LAPPO'NICA (Willd. herb, from Stev. obs. ined. D. C. 

 syst. 2. p. 344.) scapes naked, very smooth ; leaves lanceolate, 

 quite entire, rather pilose ; pods elliptical-oblong, and are as well 

 as the pedicels very smooth. If . H. Native on rocks in the 

 Alps of Lapland and Greenland ; North America in the Bay of 

 St. Lawrence. D. Androsacea, Wahl. fl. lapp. 174. no. 317. t. 

 11. f. 5. exclusive of the synonyms. D. Wahlenbergii, Hartni. 

 More loose in habit than D. nivalis. 



Lapland Whitlow-Grass. Fl.May.Ju. Clt. 1824. PI. 2 or Sin. 



33 D. HELVE'TICA (Schleich. pi. dr. Switz. D. C. syst. 2. p. 

 345.) scapes naked, very smooth ; leaves lanceolate, ciliated ; 

 pods oval, and are, as well as pedicels, very smooth. If. . H. 

 Native of Switzerland near the limits of snow on the rocky 

 top of Wendigletscher about Engelberg. D. ciliaris, Wahl. helv. 

 p. 122. no. 671. but not of Lin. 



Swiss Whitlow-Grass. Fl. May, July. Clt. 1819. PI. 1 inch. 



34 D. FIADNIZE'NSTS (Wulf. in Jacq. misc. 1. p. 147. t. 17. f. 

 1.) scapes 2 or 3-leaved, smooth; leaves oblong-linear, stiffly- 

 ciliated ; pods oblong, and are, as well as the pedicels, very 

 smooth. If. . H. Native of Croatia, Carniolia, and Carinthia, 

 on rocks in the higher mountains above Fladniz ; also in 

 Transylvania. D. Androsacea, Willd. spec. 3. p. 428. D. 

 cili&ta, Scop. earn. no. 787. t. 33. D. ciliaris, Hort. syn. 354. 

 Flowers few, approximate; sepals green, oval. 



J'ladniz Whitlow-Grass. Fl. July. Clt. 1819. PI. 1 inch. 



35 D. TOMENTOSA (Clairv. herb. val. p. 217? Wahl. fl. helv. 

 p. 123. no. 672. t. 3.) scape 1 or 2-leaved, velvety; leaves 

 oval-oblong, downy with short stellate-tomentum ; pedicels pubes- 

 cent ; pods oval, ciliated. If. . H. Native throughout the higher 

 Alps of Switzerland in the chinks of dry rocks on Gemmy and 

 Stockhorm ; central Pyrenees at Valley d'Aure, on the mountain 

 called Penne-blanque ; also on the tops of the Carpathian moun- 

 tains at the height of 6200 feet. D. dubia, Sut. Petals white, 

 3 times longer than the calyx. Pods pointed by the punctiform 

 stigma. D. hirta, Towns, itin. hung. 490. 



Tonuntose Whitlow- Grass. Fl. May, Jul. Clt. 1819. PI. 1-2 in. 



36 D. CHAMISSONI; scapes 2-3-leaved, clothed with stiff short 

 tomentum, as well as the leaves ; leaves oval-oblong ; pedicels 

 usually exceeding the length of the silicle ; silicles pubescent, 

 acute ; stigma evidently 2-lobed. If. . H. Native of North 

 America in the island of Unalaschka and the Bay of St. Lawrence. 

 D. stellata, Cham, et Schlecht. Linnaea. 1. p. 22. This plant 



